Automatic stop-motion mechanism for power-looms.



' PATENTED MAY 19, 1908.

F. BLUMBR. AUTOMATIQSTOP MOTIONMECHANISM FOR POWER LOOMS.

APPLICATION TILED SEPT.19, 1904.

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No. 888,300. PATENTED MAY 19, 1908. P. BLUMER.

AUTOMATIC STOP MOTION MECHANISM FOR POWER LOOMS.

APPLICATION IILED SEPT. 19, 1904.

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'PATENTED MAY 19, 1908.

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P MOTION MECHANISM FOR POWER LOOMS.

APPLIOATION FILED SEPT. 19, 1904- AUTOMATIC S'IO 3 SHEETSSHEBT 3.

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FRITZ BLUHER, OF ENGI, SWITZERLAND.

AUTOMATIC STOP-MOTION MECHANISM FOR POWER-LOOMS.

Specification of Letters Patent.

Patented May 19, 1908.

Application filed September 19, 1904. Serial No. 225,133.

To all whom it may concern:

Be it known that I, FRITZ BLUMER, a citizen of the Swiss Confederacy, and resident of Engi, Canton of Glarus, Switzerland, have invented certain new and useful Improvements in Automatic Stop-Motion Mechanism for Power-Looms, of which the following is a specification.

This invention relates to an automatic stop motion mechanism for power looms which, when a thread of the warp breaks, acts directly upon the disconnecting fork of the batten and thus automatically stops the loom.

The accompanying drawings represent this invention diagrammatically Figure 1 is a side elevation of this new stop motion mechanism complete. Fig. 2 is a fragmentary view of the hook. Fig. 3 is a plan of the parts shown in Fig. 1. Figs. 4 and 5 are details of the guide. Fig .6 is an elevation of the feeler. The remaining views are details of the weft stop mechanism.

The warp threads coming from the warp beam pass as shown over a guide bar or rail 0 through eyes of the detector plates P P, slotted and mounted on guide bars (1 d and grouped by three arms 0 e 6, all connected and supported by braces t much after the manner disclosed in my U. S. Patent 830561 dated Sept. 11, 1906. Lateral movement of the detector plates may also be prevented by stops K recessed and applied as in said patent.

A designates an oscillating feeler moving below said detector plates and their guides and preferably carried. by a frame A mounted on a rod V. A cam C fixed on a shaft J impinges against a bent rod B carried by said frame to impart to the latter a yielding motion in one direction while a spring D secured to a support D moves it in the opposite direction.

Z designates an articulation connecting the frame with a rod E, which latter connects With a bell-crank lever H pivoted at a. and having a substantially horizontal arm h on which rests an elbow p at the lower end of a hook P whose upper end engages the tail of the weft fork S-all as indicated in Fig. 1 The latter is pivotally supported by a rod M suitably connected with the shipper handle R in proper position so that when its hooked rear end is de ressed it will be engaged and drawn back by the weft hammer F, and thereby stop the loom.

In order that the connection between the hook P and fork S may be rendered adjustable, I employ mechanism best seen in Figs. 9 and 10, and illustrated in plan View in Fi 3. The collar T is longitudinally adj ustab e upon the rod M by a set screw U, and preferably has a depending portion V apertured to surround the body of the hook P and permit the latter to reciprocate vertically. By loosening the set screw and adjusting said collar along the rod M, the point of engagement of the hook P upon the tail of the weft fork S may be brought nearer to or further from the pivotal support of the latter as will be understood.

The operation is as follows: WVhen a warp thread breaks its detector plate drops into the path of the oscillating feeler, which is thereby held in the full line position in Fig. 1 and through the rod E and lever H, the hook P is depressed and the tail of the weft fork S dropped to a position to be actuated by the weft hammer F to cause the stopping of the loom.

\Vhat is claimed as new is:

1. In a stop motion mechanism for looms, the combination with detector plates supported by the warp threads, a weft fork pivotally supported, and the weft hammer adapted to engage said fork; of an oscillating feeler mounted below said plates, an adjustable connection between said feeler and the tail of said fork, a bent rod mounted on the feeler, a cam ressing the rod in one direction, and a spring pressing the feeler in the opposite direction.

2. In a stop motion mechanism for looms, the combination with detector plates sup ported by the warp threads, a weft fork pivotally supported, and the weft hammer adapted to engage said fork; of an oscillating feeler mounted below said plates, yielding means for moving it in o posite direc tions, a hook engaging the tar of the fork, connections between the feeler and hook, and a collar adjustable parallel with the length of the fork and having an apertured portion loosely engaging said hook.

3. In a stop motion mechanism for looms, the combination with detector plates supported by the warp threads, a weft fork pivotally supported, and the weft hammer adapted to engage said fork; of an oscillating feeler mounted below said plates, a hook engaging the tail of the fork and having an elbow, a bell-crank lever on one arm of which said elbow rests, connecious between its other arm and said feeler,a rod parallel with the fork, and a collar adjustable longitudinally on said rod and loosely engaging said hook for adjusting its point of connection with said fork.

4. In a stop motion mechanism for looms, the combination with detector plates supported by the warp threads, a weft fork pivotally supported, and the weft hammer adapted to engage said fork; of an oscillating feeler mounted below said plates, a hook engaging the tail of the fork and having an elbow, a sup ort for said elbow, means for raising and owering said support by the,

movements of the feeler, a rod pivotally sup- 1'5 porting said fork and standing parallel with its tail, a collar mounted on said rod and having a depending portion apertured and loosely surrounding the hook, and a set screw for adjusting the position of the collar 20 on the rod and hence of the hook on the fork.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

FRITZ BLUNIER.

Witnesses:

LUCAS LERGILLANT, JosEPH SIMON. 

